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| author | Maciej S. Szmigiero <mail@maciej.szmigiero.name> | 2017-11-27 23:33:29 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-11-29 09:26:33 +0100 |
| commit | 823dbb6eb08a2865bcd236b4f52b1b9de216418a (patch) | |
| tree | d69e75cd0c93df992d74b134547c22cc2e4692d4 /sound/core | |
| parent | 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff) | |
| download | linux-823dbb6eb08a2865bcd236b4f52b1b9de216418a.tar.bz2 | |
ALSA: pcm: add SNDRV_PCM_FORMAT_{S,U}20
This format is similar to existing SNDRV_PCM_FORMAT_{S,U}20_3 that keep
20-bit PCM samples in 3 bytes, however i.MX6 platform SSI FIFO does not
allow 3-byte accesses (including DMA) so a 4-byte (more conventional)
format is needed for it.
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_misc.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c index 9be81025372f..c4eb561d2008 100644 --- a/sound/core/pcm_misc.c +++ b/sound/core/pcm_misc.c @@ -163,13 +163,30 @@ static struct pcm_format_data pcm_formats[(INT)SNDRV_PCM_FORMAT_LAST+1] = { .width = 32, .phys = 32, .le = 0, .signd = 0, .silence = { 0x69, 0x69, 0x69, 0x69 }, }, - /* FIXME: the following three formats are not defined properly yet */ + /* FIXME: the following two formats are not defined properly yet */ [SNDRV_PCM_FORMAT_MPEG] = { .le = -1, .signd = -1, }, [SNDRV_PCM_FORMAT_GSM] = { .le = -1, .signd = -1, }, + [SNDRV_PCM_FORMAT_S20_LE] = { + .width = 20, .phys = 32, .le = 1, .signd = 1, + .silence = {}, + }, + [SNDRV_PCM_FORMAT_S20_BE] = { + .width = 20, .phys = 32, .le = 0, .signd = 1, + .silence = {}, + }, + [SNDRV_PCM_FORMAT_U20_LE] = { + .width = 20, .phys = 32, .le = 1, .signd = 0, + .silence = { 0x00, 0x00, 0x08, 0x00 }, + }, + [SNDRV_PCM_FORMAT_U20_BE] = { + .width = 20, .phys = 32, .le = 0, .signd = 0, + .silence = { 0x00, 0x08, 0x00, 0x00 }, + }, + /* FIXME: the following format is not defined properly yet */ [SNDRV_PCM_FORMAT_SPECIAL] = { .le = -1, .signd = -1, }, |